Jan 23, 2017 While the iOS 10 does come with a lot of brand new features that most of us cannot wait to try out, those user installed iOS 10 have already reported a number of issues.
Why Does 3utools Keep Saying Firmware Check Code Error 3utools
Update your Mac or PC
Install updates for your Mac. If you have a PC, get updates from Microsoft. If you're using iTunes, make sure you have the latest version.
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Plug directly into your computer
Plug your iOS device directly into your computer's USB port (not into an attached keyboard or USB hub). If you still see an error alert, try a different cable.
Restart
Turn off your computer and your device. Then turn them on again.
Here's how to restart your iPhone, iPad or iPod touch.
Check your computer’s security software
You might need to update, change or uninstall software that could be interfering with your computer's connection with iTunes.
Try again
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Get more help
Why Does 3utools Keep Saying Firmware Check Code Error Windows 10
If you tried these steps and saw the error again, follow the steps for your error code.